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| Water Quality Monitor - A water quality monitor is used to indicate membrane performance on the PDQT models. Using dual probes, a split second power pulse compares the total dissolved solids (TDS) level of the feed water with that of the product water. Pressing the test button on the face of the cooler activates the monitor. A green "good" light will illuminate indicating above a 70% TDS reduction or a "yellow" service light will illuminate indicating below 70% TDS reduction. Power is supplied by a 9-volt battery located within the access door on the front of the unit. |
